Picture on my Samsung LE37A has faded - suspect the T-CON board. But how do I remove the board for replacement? (ribbon cables seem to be soldered in)
I have removed the back, removed the screws from the T-CON board's metal cover and disconnected the ribbon cable connector at the bottom, but the two ribbon cables at the top appear to be permanently fixed into circuitry in the top edge of the frame.
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Re: Picture on my Samsung LE37A has faded - suspect the...
It is not soldered. It is connected with sockets at two of it ends. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Disassemble procedure to many popular brand TVs and other devices are given in detail with illustrations.
Testimonial: "Thankyou. I'll take another look, but the way that the T-CON assembly is attached at the top does not make me feel comfortable that it is supposed to be disconnected - they are not disengagable sockets. Perhaps a photo would help (the reference you gave is certainly helpful, but it does mention that different models have different disassembly procedures and a single explanation isn't going to cover them all - but thanks anyway)"
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Bad connection on a circuit board then, could be just a ground. Press on boards carefully with a wooden chopstick to see if it fires up. Helps sometimes to put plastic or wood shims if it is impossible to find the failed solder.
With my experience on vizio tv's I don't think I would go any further.. Any repair isn't cost effective because either you disturb their poor connections and have to chase down bad solder joints or cheap ribbon cable sockets.
Gotta remove those ribbons. There is usually a little tab at the end of the plastic fitting - you pull it out and carefully slide the ribbon out. Get a utube video on it so you can see exactly how to do it. Putting ribbon back is just the opposite. Delicate operati so you have to be very careful not to damage the ribbon.
On some sets the cables need to be removed before the metal plate will come off. If this is the case the top connector will release the ribbon cable by carefully flipping the black plastic piece down. The bottom connector has two points on the sides of the cable that need to be compressed to remove the cable from the T-con. The metal plate is having a resistance of removal due to the heat sink pad. A slight even pulling pressure will separate the two without damage, Hope his helps. :)
If you had a white picture the backlight converter board did not need to be replaced. The T-Con board controls the picture. This board has one or two flat ribbon cables going to the bottom of the screen. It usually is located near the center of the TV chassis.
have a close look at your LVDS cable and screen ribbons for signs of failure or heat damage, and you could try to pull a picture from an AV output in various formats to see if it's the screen itself is failing in some way,